Bridge structures serve an important role within a nation’s economy and provide a critical link between communities. It has been well documented that a significant portion of bridges around the world are in need of rehabilitation or replacement. Many of these structures are suffering from the effects of corrosion of reinforced concrete. Exposure to a marine environment in coastal areas or to the de-icing salts on freeways provides the source for aggressive chloride ions that will eventually initiate corrosion activity.
Corrosion mitigation systems that extend the service life of these important structures are commonly used such as:
Targeted Protection –
Typical applications include Galvashield® embedded galvanic anodes which are used to extend the life of patch repairs, expansion joint repairs, and joints created during bridge widening. Galvashield® CC anodes are used to provide proactive targeted corrosion control to pier caps, columns and precast/prestressed beam ends under expansion joints.
Global Protection –
Norcure® Chloride Extraction, one of the most significant technologies to come out of the FHWA Strategic Highway Research Program, addresses the root cause of the corrosion problem by significantly reducing the level of chlorides and leaving the structure in a long-term passive condition.
For many structures, Galvanode® ASZ+ humectant activated zinc metalizing provides an economical method of extending the service life of bridge substructures by proving galvanic cathodic protection.
Galvanode® DAS distributed anode system can be used to provide galvanic cathodic protection to bridge decks and to structures that are to be overlayed or jacketed with new concrete.
Galvanode® Jackets are designed to provide one-step repair and protection of columns and piling in both marine and non-marine applications.